Lining for shafts, &amp;c.



R- M. DRAVO & F. DONALDSON. LINING FOR SHAPTS, 6w. APPLICATION FILEDAPR. 11, 1907.

971,734. Patented Oct. 4, 1910.

waTflEss a INVENTQRS,

osurrnn sra'ras rarnsr orricn RALPH IVJI. DRAVO, OF EDGEWORTH,PENNSYLVANIA, AND FRANCIS DONALDSON, OF DAVENPORT, IOWA.

LINING roe SHAFTS, 860.

To all whom "it may concern:

Be it known that we, RALPH M. Dnavo, a resident of Edgeworth, in thecounty of Allegheny and State of Pennsylvania, and FnaNois DONALDSON, aresident of Davenport, in the county of Scott and State of Iowa, haveinvented a new and useful Improvement in Linings for Shafts, &c.; and wedo hereby declare the following to be a full, clear, and exactdescription thereof.

This invention relates to linings for shafts, wells and the like. Itsobject is to provide a shaft lining which is strong, durable orindestructible by decay or chen'iically, and which can be quickly put inplace so as not to interfere with other work in the shaft.

In an application of even date herewith, Serial No. 367,566, there isdescribed and claimed a shaft lining consisting of separate reinforcedconcrete members which are molded on the surface and then set up orassembled in the shaft, said lining comprising suitable ring beams,posts, cross struts and lagging. This application is one of the specificapplications referred to in our application above identified andillustrates and claims a specific arrangement coming within the broadclaims of the aforesaid' application.

The invention comprises the construction and arrangement of partshereinafter described and claimed.

Figure 1 is a perspective view of a portion of the shaft lining; Fig. 2is a vertical section on the line 2 2, Fig. 1; Fig. 3 is a perspectiveview of the end of a. wall plate, and Fig. 4 is a perspective viewshowing a modification.

The shaft lining illustrated is composed entirely of built up sectionsformed of reinforced concrete. This lining comprises lagging or wallplates 1 and 2 arranged horizontally, as shown, and resting one upon theother. The wall plates 1 are formed with plain ends, as shown, while thewall plates 2 are provided on their inner faces near their ends withprojections 3 forming a rabbet 4 for receiving the end of a plate 1.Consequently, these wall plates at the corners have mutual abuttingshoulders which prevent the plates being forced inwardly. Preferably theplates 1 and 2 are arranged alternately, as shown in Fig. 1, so as tobreak joints at the corners. The side wall Specification of LettersPatent.

Application filed April 11, 1907.

Patented Oct. at, 1910.

Serial No. 367,568.

plates between the ends are provided with vertical ribs or projections(3, leaving between the same a groove 7 into which project the ends ofthe cross struts 8, these struts being held in position by posts 9 alsoseated in the groove 7 and receiving the ends of the struts between thesame. Preferably the ends of the struts are reduced, as shown at 10, soas to provide shoulders 11 abutting against the side posts. These strutsreceive the usual guides for the cage.

Fig. 4L shows a modification wherein the side posts 9, instead of beingmade of short sections receiving between the same the ends of thestruts, are made of greater length and provided on their inner faceswith sockets 12 and 13 for receiving tenons 14L on the ends of thestruts.

Allof the parts forming the shaft lining are formed of concretereinforced by metal. The wall plates are preferably reinforced by meansof longitudinal rods 15 and also if necessary by transverse loops orstirrups, or they may be reinforced by a suitable metal mesh, such asexpanded metal. Ordinarily, however, simple longitudinal rods aresufficient. The posts and struts likewise are reinforced with metal,such as by means of the longitudinal rods 16 and transverse stirrups orloops 17, the latter serving principally as a means for properly spacingthe longitudinal rods. All of these parts may be readily formed insuitably shaped molds and can be made of any size or shape to meet theconditions encountered. These parts are molded on the surface andallowed to thoroughly set and when a sufficient quantity is 011 hand andwhen the shaft is ready for the same they are lowered down into theshaft and set up or erected with a minimum amount of labor and quiteexpeditiously, it merely being necessary to assemble the parts in themanner illustrated in Fig. 1, and if necessary to fill in behind thewall plates with earth, rubble, or any other material on hand.Consequently, there will be no unnecessary interruption of other work inthe shaft as is the case where it is attempted to build up concrete ormasonry linings directly in the shaft.

While the lining is shown as applied to a vertical shaft, it obviouslycan be adapted to inclined shafts.

What we claim is:

1. A shaft lining composed of a plurality of layers of reinforcedconcrete plates horizontally arranged and provided with verticalgrooves, vertically extending posts seated in said grooves, and crossreinforced concrete struts having end portions projecting between themeeting ends of the posts and seated in said grooves.

2. A shaft lining composed of a plurality of layers of horizontallyarranged concrete reinforced plates provided with registering verticalribs, reinforced concrete posts vertically seated between said ribs, andreinforced concrete struts having reduced end portions fitting betweenadjacent ends of said posts.

3. A shaft lining composed of a plurality of layers of horizontallyarranged concrete plates, each layer being provided with ribs formingbetween the same a vertical groove in alinement with the like grooves ineach of the other layers, said grooves being disposed intermediate theends of each side of the shaft lining, and vertically arranged reinforced concrete posts in said grooves, each post extending through aplurality of said layers and terminating intermediate of a layer.

4. A shaft lining composed of a plurality of layers of horizontallyarranged reinforced concrete plates, each layer being provided with ribsforming between the same a vertical groove in alinementwith the likegroove in each of the other layers, said grooves disposed intermediatethe ends of each side of the shaft lining, vertically arranged reinforced concrete posts in said grooves, each post extending through aplurality of said layers and terminating intermediate of a layer, andreinforced concrete cross struts having reduced ends abutting in saidgrooves and seated between the ends of adjacent posts.

In testimony whereof, we the said RALPH M. DRAVO and FRANCIS DONALDSON,have hereunto set out hands.

RALPH M. DRAVO. FRANCIS DONALDSON. lVitnesses M. D. VooEL, F. V. VINTER.

